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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>函数参数默认值</title>
</head>

<body>

    <script>
        //ES6 允许函数参数赋值初始值
        //1.形参初始值,具有默认值的参数，一般位置要靠后(潜规则)
        function add(a, b, c = 10) {
            return a + b + c;
        }
        let result = add(1, 2, 3);
        console.log(result);

        //2.与解构赋值结合
        function connect({ host, username, password, prot }) {
            console.log(host);
            console.log(username);
            console.log(password);
            console.log(prot);
        }
        connect({
            host: '嘻嘻啊哈哈',
            username: 'root',
            password: 'root',
            prot: 3306
        })



    </script>

</body>

</html>